package cn.com.shopec.erp.core.utils;


import javax.servlet.ServletContext;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;

public class SpringContextUtil implements ApplicationContextAware {

	private static ApplicationContext applicationContext;
	
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		SpringContextUtil.applicationContext = applicationContext;
	}
	
	public static ApplicationContext getApplicationContext(){
		return applicationContext;
	}
	
	public static Object getBean(String name) throws BeansException {
		return applicationContext.getBean(name);
	}
	
	public static <T> T getBean(Class<T> requiredType) throws BeansException {
		return applicationContext.getBean(requiredType);
	}
	
	public static ServletContext getServletContext() throws BeansException {
		WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
		if (null == webApplicationContext) {
			return null;
		}
		return webApplicationContext.getServletContext();
	}
	
	public static String getServletContextPath() {
		return ContextLoader.getCurrentWebApplicationContext().getServletContext().getContextPath();
	}

}
